Printing-press.



J. THOMSON.

PRINTING PRESS.

APPLICATION FILED DBO.14. 1910.

Patented Oct. 13, 1914.

2 SHEETS-SHEET 1 THE NORRIS PETERS Ca. FHOTO-LITHCL, WASHINGTON. D1 0.

J. THOMSON.

PRINTING PRESS.

APPLICATION FILED 1130.14, 1910.

1,1 1 3,508. Patented 0013. 13, 1914.

Z SHEETS-SHEET 2.

- "1 1 F v L J WWW ' INVENTOR P'JI'WY'LIJTHQ, WASHINGTON D. C.

UNITED STATES PATENT OFFICE." l 1;; g

- JOHN THOMSON, OF NEW YORK, N. Y., ASSIGNOR TO JOHN THOMSON PRESS COM- PANY, OF JERSEY CITY, NEW JERSEY, -A CORPORATION OF NEW JERSEY. I

PRINTING-PRESS.

' To all whom it may concern V Be it known that 1, JOHN THOMSON, a citizen of the United States, and a resident of the borough of Manhattan of the city'of New York, in the State ofNew York, have invented certain new and useful Improvements in Printing-Presses, of which the following is a specification, reference being had to the accompanying drawing, forming a part hereof. This invention relates to'printing presses in which none of the reciprocating form inking rollers will pass in contact with the form in more than one direction of its reciprocatory travel during each printing period. In the specificembodiment of the invention illustrated uponthe drawing all of the form inking rollers pass inconta'ct with the form in one direction ofreciprocw,

tion but not in contact with the form in the reverse d1rect1on of movement.

While the inking device is applicable to many types of presses, the application, for

the purpose of the present description, is to be understood as being applied to a style of platen printing press generally known to the trade as The Colts Armory.

In the drawings, Figure 1 is a diagrammatic illustration of the action; Fig. 2 is a detached view of a carriage-way with the trucks or roller wheels, and Fig. 3 is a detached view of a form-roller with its trucks thereon.

Complete details have been omitted from the drawings for the reason that there are many thousands of these presses in operation with which printers and mechanicians skilled in the art are familiar. Thus, A is vone of the two frames, tied togetherby rods, as 2, this structure constituting the carriage and in which are mounted a series of slidable boxes, B, usually from two to four, the latter number being here shown. In'these boxes the composition form inking rollers O The carriage, as awhole, is mounted in carscribed.

are mounted, as by their stock-spindles, 3. Attached to each box is a spindle, as 4:, freely mounted in the frame, which carries a spiral spring, as 5, acting to pull'the box inwardly, or to the right hand side of "the drawing. Thus, when the boxes are drawn outwardly the form vrollersmay readily be inserted or removed and the said rollers are thereby free to rise and fall, if needs be, against and with the resilient action of. the springs.

Specification of Letters Patent.

PatentedOct. 13, 1914.

Application filed December 14, 1910. Seria1 No.597,260.

riage ways, as R, Fig. 2, bolted to the side of the bed of the press, to traverse down "andup, the actionbeing produced by links, as D, connected to and actuated by vibrating arms. When the carriage is fully up'a, fresh chargeof'ink is delivered to the form rollers by a revolving cylinder, orcylinders, as denoted by thebroken lines, H. U

, All of the vforegoing is old and well lniown i in theart, and it has alsobeen the practice for thirtyv years past, in the instance of the aforesa1d.Colts Armory"? press, toapply latches to the carriage whereby onejor two of the form rollers would be carriedout,

free from theform, on the down movement; but would be released at or near the lower termination of the action, the suspended roller or rollers then being free to ink the form, together with the other rollers not,

pr1marily suspended, on the lip-movement. The conditions embodied in the device referred to has given and will give good results when used in connection with ordinary type-forms; but with certain half-tones, three-color and tint-plates, and the fmuch finer, and denser mks now being produced,f

it frequently fails to realize that degree of perfection which is essential to thehighest grade and "quantity of, product. Consequently, practice under new and more severe conditions has demonstrated that the earlier theory does "not hold good, e.,lto

ink the form fromthe top downwardlywith a portion of the rollers and from the bottom upwardly with all of the rollers.

' It has been found after much experimentation, and abundantly proven upon a commercial scale of operation, that the desired result can be obtained by simply causing all of the form rollers to pass in contact over. the form once. Without pretending to give a complete analysis of the reasons why this result should ensuefor it issomewhat i contradictory of the usual opinionthis much, however, can be said, namely? that with many inks the body or character'is such that when once deposited as a filmup'onthe form if the same roller section or sec tions which have already engaged the form again pass over it during the same printing period aportion, or portions, ofthe primary film is again picked up, or withdrawn. Y

The improved method of operation has been realized in the manner now to be de- The outer surfaces of the boxes, B, project somewhat beyond the finished face, as 7, of the carriage frame. Pivoted on each frame, as at 8, 9, are two arms, 10, 12, and to the inner ends of these arms a connecting connecting links lie against the finished surfaces of the frames, their rearward position being limited by stops, as the pin 16 with which arm 10 engages.

Now, when the parts are in the full-line position shown in the drawing, all of the form rollers will ink the form- J on the down movement, as indicated at K; but as the carriage nears the lower termination of its movement the extension, 10, of the arm 10, is caused to impinge-upon a projection or pin, as 17,- fixed' in the side frame of the press, so as to force the end, 10, upwardly until the arms lie about horizontally, as 18. That is, the swinging. pivots, 1 1', 15, are carried to the points 19, 20, which thus carries the link forward and forces out all of the boxes. This, then, leaves all of the rollers suspended free, as denoted at P, so that on the return or up-movement they will not be in contact with the form. The rollers are thus returned: until they are nearing. the.

cylinders when the extension, 10 impinges upon a projection or pin as 22, mounted in ways and carrying a vertical form, a verti- Ical' reciprocating roller inking mechanism having all the rollers therein provided with trucks, said rollers being supported so as to ink the form on the downward stroke of 'the inking mechanism, and means to: elevate all of the rollers prior to the return the carriage-way of the press, and when the pivots 14:, 15, are carried slightly beyond their dead centers they will be snapped by the reaction of the: boxes, to the full line position of the drawing. I g

It is to be noted that the connecting link mayengage pins set into the faces of the boxes. when such a: construction is more convenient than that described.

In previous practice the lower roller or the two lower rollers, have been latched out by the action of the main cylinders, the latch simply acting tohold them in such position until relieved at the bottom of the stroke; but in the present device this condition is reversed, the rollers being. forced out by the swing. of the carriage at or near the termination of the down movement. The advantages of this reversal of the conditions. are that rollers pass from: the cylinders directly to the form; there is less liahility of slippage between the roller trucks, as S, andi the ways, as R, and the snap of the release is cushioned by the contact of the composition rollers upon. the cylinders. Moreover, no springs are required nor are any close adjustments necessary, such as providing for the whip-like variation in the reversal of the: carriage at high rates of speed, especially when the connections become worn.

The device as herein described and illustrated operates with the utmost smoothness of action and is practically noiseless and not only can far better results be obtained by this method of single rolling but the output is in" many classes of forms easily doubled. link, 13, is also pivoted, as at it, 15. The

I claim as my invention: 1. In a press the combination of a frame provided with ways and carrying means to deliver ink to an inking mechanism, a form and a roller inking mechanism comprising ,inking rollers provided with trucks, which ,inking mechanism is arranged to be re- ;ciprocated between the. position for receiving ink from the ink delivering means and the position for inking the form, the rollers in the inking mechanism all mounted so L that the trucks thereof will be rotated due to their engagement with the ways during the travel from the means to deliver ink to the inking mechanism, the rollers also Q mounte'd so that they will contact with the ,formonly during the travel from the position in which they receive ink from the ink ,delivering. means and so that they will be fel'evated in a manner to prevent their contacting with the form during any return imovement over the form and means between the frame and; rollers forcausin'gsald ,GlBVZLflOIl of the rollers.

2. In a press a frame having carriagemovement of the rollers over the form jwhereby the latter will not receive any ink during the upward stroke, the rollers being ,rotated on the downward stroke, prior to the engagement of the rollers with the form, due to the engagement of the roller trucks 1 with the ways.

3. In a press a frame carrying means to deliver ink to an inking mechanism, a verjtical form, a reciprocatory mechanism having inking rollers provided with trucks lwh i'ch' travel" on ways in the press, the rollers being rotated by the trucks on the ways when the inking mechanism is'traveling forward toward" the form from the means ,which delivers ink to the lnking mechanism,

and means for lifting the rollers from contact with the form when the inking mechanism is returning.

This specification signed and witnessed this 12th day of December, A. D., 1910.

, JOHN THOMSON. Signed in the presence of J. R. .FRITH,

E. E. Klnonnn.

Copies of this patent may be obtained for fivecents each by addressing the Commissioner of Patents,

Washington, D. G. 

